The study of riparian vegetation in exposed areas is based on the observation of natural plant communities colonising newly exposed mudflats, across different temporal scales (intra- and inter-annual variations) and nested spatial scales. The botanical survey is carried out using the Braun-Blanquet method.

The sampling protocol is stratified in order to maximize the recorded diversity. For each study area, a transect perpendicular to the riverbed is established, on which quadrats of 25m2 (5x5m) are positioned. These quadrats are used for the identification of substrates and the determination of species present (on the ground and in vertical strata). All species in the quadrats were surveyed and their abundance was estimated. The main vegetation units have also been described.

This layer provides the locations of these study areas as well as the various information characterizing them (watercourse, reference point, position on the catchment area, transect, associated drainage basin) for the campaign sessions from 2021 to 2026.